/* ============================================================================
   APP-SHELL — capa premium compartida por las páginas logueadas y de auth
   (curso, admin, login/registro/recuperar/reset, cierre).
   Se carga DESPUÉS de style.css para poder refinar el nav sin tocar la landing.
   Scope: body.app-shell
   ============================================================================ */

/* --- Barra de navegación refinada --- */
.app-shell nav {
    background: rgba(5, 5, 5, 0.85);
    -webkit-backdrop-filter: blur(15px);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--hairline-strong);
    z-index: var(--z-nav);
}

.app-shell .nav-desktop a {
    position: relative;
    font-size: 0.82rem;
}
.app-shell .nav-desktop a:not(.logo-link)::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 100%;
    height: 2px;
    background: var(--gold-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s var(--ease-luxe);
    border-radius: 2px;
}
.app-shell .nav-desktop a:not(.logo-link):hover::after { transform: scaleX(1); }

/* Hamburguesa: target táctil cómodo (≥44px) */
.app-shell .hamburger {
    width: 46px;
    height: 46px;
    display: none;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    font-size: 1.7rem;
    transition: background 0.2s, color 0.2s;
}
.app-shell .hamburger:hover { background: rgba(255, 0, 127, 0.07); color: var(--pink-hot); }

/* Breakpoint propio del app-shell: nav desktop hasta 1024, drawer por debajo.
   Mayor especificidad (.app-shell .x) que la regla de la landing → gana. */
@media (min-width: 1025px) {
    .app-shell .nav-desktop { display: flex; }
    .app-shell .hamburger { display: none; }
}
@media (max-width: 1024px) {
    .app-shell .nav-desktop { display: none; }
    .app-shell .hamburger { display: inline-flex; }
}

/* --- Drawer lateral (reemplaza el dropdown full-width heredado) --- */
.app-shell .mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    left: auto;
    width: min(86vw, 370px);
    height: 100dvh;
    background: linear-gradient(180deg, #100a0d 0%, #050505 100%);
    border-bottom: none;
    border-left: 1px solid var(--hairline-gold);
    box-shadow: -30px 0 80px rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 4px;
    padding: 92px 22px 28px;
    transform: translateX(110%);
    transition: transform 0.42s var(--ease-luxe);
    visibility: hidden;
    z-index: var(--z-drawer);
    overflow-y: auto;
}
.app-shell .mobile-menu.active {
    transform: translateX(0);
    visibility: visible;
    animation: none;
}

/* Links y botones dentro del drawer: filas grandes y cómodas */
.app-shell .mobile-menu a,
.app-shell .mobile-menu .nav-logout {
    width: 100%;
    text-align: left;
    justify-content: flex-start;
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 52px;
    padding: 12px 16px;
    border-radius: 14px;
    font-size: 1rem;
    font-weight: 500;
    text-transform: none;
    letter-spacing: 0;
    color: var(--text-main);
    text-decoration: none;
    transition: background 0.2s, color 0.2s;
}
.app-shell .mobile-menu a:hover,
.app-shell .mobile-menu .nav-logout:hover {
    background: rgba(255, 0, 127, 0.07);
    color: var(--pink-hot);
}
.app-shell .mobile-menu .nav-logout {
    margin-top: 10px;
    border: 1px solid var(--hairline-strong);
    border-radius: 14px;
}

/* Botón de cierre (lo inyecta app-shell.js) */
.app-shell .drawer-close {
    position: absolute;
    top: 22px;
    right: 20px;
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--hairline);
    background: var(--surface);
    border-radius: 50%;
    color: var(--text-main);
    font-size: 1.4rem;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, transform 0.2s;
}
.app-shell .drawer-close:hover { color: var(--gold); border-color: var(--gold); transform: rotate(90deg); }

/* Encabezado del drawer */
.app-shell .drawer-brand {
    position: absolute;
    top: 26px;
    left: 22px;
    font-family: var(--font-heading);
    font-size: 1.05rem;
    color: var(--text-muted);
    letter-spacing: 1px;
}

/* Overlay (lo inyecta app-shell.js) */
.nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(74, 14, 40, 0.42);
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s var(--ease-luxe), visibility 0.35s;
    z-index: var(--z-overlay);
}
.nav-overlay.active { opacity: 1; visibility: visible; }

body.nav-open { overflow: hidden; }

/* ============================================================================
   INDICADORES DE SCROLL HORIZONTAL (skill: horizontal-scroll)
   La estructura .scroll-x > viewport + fades la arma app-shell.js.
   ============================================================================ */
/* Solo lectores de pantalla */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.scroll-x { position: relative; }

.scroll-x__fade {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 46px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.25s ease;
    z-index: 2;
}
.scroll-x__fade--left {
    left: 0;
    background: linear-gradient(90deg, var(--surface) 10%, transparent);
}
.scroll-x__fade--right {
    right: 0;
    background: linear-gradient(270deg, var(--surface) 10%, transparent);
}
.scroll-x.can-scroll-left > .scroll-x__fade--left { opacity: 1; }
.scroll-x.can-scroll-right > .scroll-x__fade--right { opacity: 1; }

.scroll-hint {
    position: absolute;
    right: 12px;
    bottom: 10px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: var(--r-pill);
    background: rgba(74, 14, 40, 0.9);
    color: #fff;
    font-family: var(--font-body);
    font-size: 0.74rem;
    font-weight: 600;
    letter-spacing: 0.4px;
    box-shadow: 0 6px 18px rgba(74, 14, 40, 0.3);
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 0.25s ease, transform 0.25s ease;
    pointer-events: none;
    z-index: 3;
}
.scroll-x.can-scroll-right > .scroll-hint { opacity: 1; transform: translateY(0); }
.scroll-hint i { font-size: 0.95rem; animation: scrollNudge 1.4s ease-in-out infinite; }
@keyframes scrollNudge {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(3px); }
}

/* Scrollbar fina y a tono para contenedores con scroll interno */
.lux-scroll { scrollbar-width: thin; scrollbar-color: rgba(212, 175, 55, 0.55) transparent; }
.lux-scroll::-webkit-scrollbar { width: 8px; height: 8px; }
.lux-scroll::-webkit-scrollbar-track { background: transparent; }
.lux-scroll::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, rgba(212, 175, 55, 0.7), rgba(255, 0, 127, 0.4));
    border-radius: 50px;
    border: 2px solid transparent;
    background-clip: padding-box;
}
.lux-scroll::-webkit-scrollbar-thumb:hover { background: rgba(212, 175, 55, 0.9); background-clip: padding-box; }